专题7定语从句考点1as引导定语从句真题解密_ is often the case with children，Amy was better by the time the doctor arrived.(2013陕西，16)AIt BThatCWhat DAs答案D解析句意为：就像其他小孩子的情况一样，医生到达时Amy好多了。as is often the case通常就是这样，此处as 引导非限制性定语从句，用来代替后面整个主句的内容。变式训练(1)There is no simple answer，_is often the case in science.(2013山东，31)Aas Bthat Cwhen Dwhere答案A解析考查定语从句as引导的非限制性定语从句。as引导非限制性定语从句，可以指代前面提到的整句话。所以答案为A项。(2)A computer is so useful a machine _ we can use everywhere.Athat BwhichCas Dwhat答案C解析定语从句中动词use缺少宾语，且先行词前有so，故应选择as引导定语从句，构成so.as.。知识生成1as通常引导非限制性定语从句，先行词为整个主句。2as引导非限制性定语从句时，主句中往往有such，the same，as，so等词。3注意：such/so.that.(that引导结果状语从句)和such/so.as.(as引导定语从句)的区别。He is such a good boy that we all like him.他是那么好的一个男孩，我们都喜欢他。He is such a good boy as we all like.他那么好我们都喜欢。考点2where引导定语从句真题解密Sales director is a position _ communication ability is just as important as sales skills.(2012重庆，29)Awhich BthatCwhen Dwhere答案D解析句意为：导购员是一个沟通能力和销售能力同样重要的职位。分析题干可知a position后是一个定语从句，而该从句的引导词在从句中作地点状语，故选D项。在定语从句中，当position，point，case，stage，situation等表示抽象地点的名词充当先行词时，若定语从句中缺少状语，则用where来引导定语从句。变式训练Its helpful to put children in a situation _ they can see themselves differently.Athat BwhenCwhich Dwhere答案D解析考查定语从句。先行词是situation，其后是一个宾语从句，引导词在从句中做地点状语，用关系副词where，故选D项。知识生成当先行词为position，case，point，stage，situation，condition等，且定语从句中不缺少主要成分时，常用where引导定语从句，此时where相当于under which，from which，意为“在这种情况下，从中”。一些不是明显表示地点的名词作先行词时，也常用where引导定语从句。如：He wrote a letter where he explained what had happened in the accident.(2013江西，33)他写了一封信，在信中，他解释了这起故事发生的事情。Nowadays people are more concerned about the environment where they live.(2013四川，9)现在人们更加关注他们生活的环境。Those successful deaf dancers think that dancing is an activity where sight matters more than hearing.那些成功的盲人舞蹈家认为舞蹈是一项视觉比听觉更为重要的活动。考点3“介词when或where”引导定语从句真题解密The book was written in 1946，_ the education system has witnessed great changes.(2007山东，35)Awhen Bduring whichCsince then Dsince when答案D解析since whensince 1946，此处用since来连接两个句子，其主句要用现在完成时态。变式训练I climbed up to the top of the tower with my friend，_ we enjoyed a splendid view of the city.Awhere BwhichCfrom where Din which答案C解析from wherefrom the top of the tower，符合上下文逻辑关系。知识生成关系副词when，where前可加介词since，from等引导定语从句。Two years ago I bought a packet of your razor blades，since when I have used no others.两年前我买了一包你们的剃须刀片，从那以后我再没用过别的。China is the birth place of kites，from where kite flying spread to Japan，Korea，Thailand and India.中国是风筝的故乡，从那里风筝传到日本、朝鲜、泰国和印度。考点4which引导非限制性定语从句真题解密We have launched another manmade satellite，_is announced in todays newspaper.(2013天津，6)Athat Bwhich Cwho Dwhat答案B解析考查非限制性定语从句。which在此引导非限制性定语从句，指代前面整个句子。that不能引导非限制性定语从句；who指代前面句子中表示人的词；what不引导定语从句。变式训练Mo Yan was awarded the Nobel Prize for Literature in 2012，_made one of the Chinese peoples longheld dreams come true.(2013安徽，29)Ait Bthat Cwhat Dwhich答案D解析考查定语从句的引导词。句意为：莫言获得2012年诺贝尔文学奖，这件事使中国人民长久以来的一个梦想得以实现。which引导非限制性定语从句，指代逗号前的全部内容。知识生成which引导非限制性定语从句，修饰整个主句时，从句要放在主句后。which在从句中作实义动词的主语时，不能用as代替。如果主从句语义不一致，要用which引导定语从句，如：He came at last，which we didnt expect.他最终来了，这是我们所没想到的。考点5“名词/代词/数词等ofwhich/whom”引导定语从句真题解密The children，_ had played the whole day long，were worn out.(2013浙江，5)Aall of what Ball of whichCall of them Dall of whom答案D解析考查定语从句。先行词为children，故排除A、B两项；all of them不能引导定语从句。D项中whom为关系代词，指代前面的children，故答案为D项。变式训练John invited about 40 people to his wedding，most of _ are family members.(2013重庆，24)A them BthatCwhich Dwhom答案D解析考查定语从句。句意为：约翰邀请了大约40人参加他的婚礼，其中大多数是他的家人。前后句之间用逗号隔开了，故答案不可能是A项；that不引导非限制性定语从句；先行词是40 people，指人，故用关系代词whom。知识生成介词of表示整体和部分的关系，of前边会出现复杂的形式，常见的有 “some/several/a few/a little/many/more/most/the larger/the biggest/half/many等ofwhich/whom”形式。做题时如果不好理解，可将关系代词换成先行词，则句子结构和意义就比较明显了。考点6区分定语从句和并列句真题解密Ted came for the weekend wearing only some shorts and a Tshirt，_ is a stupid thing to do in such weather.(2011大纲全国，7)Athis BthatCwhat Dwhich答案D解析句意为：Ted仅穿着短裤和T恤来过周末，在这种天气下这样做真愚蠢。which引导非限制性定语从句，在从句中作主语。this，what不能引导定语从句；that不能引导非限制性定语从句。变式训练The doctor advised Vera strongly that she should take a holiday，but _ didnt help.Ait BsheCwhich Dhe答案A解析句中有并列连词but，因此整个句子是一个并列句，所以用代词it，指代前面句子的内容。知识生成学习定语从句时，要注意和并列句的区分。如果前后句之间是分号，这说明整个句子是并列句，不需要用关系词；如果前后句之间有and，but，so，or等连词，则整个句子也是并列句，也不需要用关系词；如果前后句之间是逗号，因逗号不能连接两个独立的句子，故必须用关系词来引导定语从句。1The president of the World Bank says he has a passion for China，_he remembers starting as early as his childhood.